Hello William, When it comes to flipping properties Hard money is the best option and maybe a 203k loan which is a rehab type loan but its owner occupied.

Seems like you have no limit on options, this is really a strategy choice.

I have probably more options and ideas than you want, lol. 

I was thinking option 3 made most sense and also not sell any of them since they cash flow and have been able to get new tenants fairly easily or have had long term tenants.

Send me a message and we can schedule a short phone call and I answer any general questions you have and hopefully get you going.Another option is go to one of your local auctions and talk to people bidding on properties.

If I'm in your shoes, I'd recommend interviewing and meeting with different brokers across the spectrum to get a good sense of which option is right for you.

You have a lot of options with fourplexes which is why they are so popular to buy. 

An alternative option is a solo 401k if you’re self employed with no w2 employees other than a spouse.  

Then you could determine how far you want to go with the project vs your capital vs partnering with someone to help make the vision viable. 

@Rashid Khalil, not a good approach in my option for a bunch of reasons. 1.